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Full-codebase-audit 2026-05-30 outputs: - Audit report: 09 - Audits/Full Codebase Audit - 2026-05-30.md - 81 issue files ISSUE-055..135 (decisions + 1 skipped no-brainer). - Scanner docs from scratch (was zero): architecture, data model, API ref, payment flow, operations runbook + repo README. - Doc-sync updates across API reference, data models, flows, design system. - Secret Rotation Runbook (08 - Operations) for the exposed credentials. - Reusable workflow guide (07 - Development) + .claude/workflows/full-codebase-audit.js. Issues remain status:open intentionally — the code fixes are uncommitted-then-committed working-tree changes per repo and aren't "resolved" until merged/deployed. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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issue, title, severity, domain, labels, status, created, source
| issue | title | severity | domain | labels | status | created | source | |||
|---|---|---|---|---|---|---|---|---|---|---|
| 072 | Backend: chat messages stored as embedded array — unbounded document growth, 16MB ceiling | high | Chat |
|
open | 2026-05-30 | Full Codebase Audit 2026-05-30 |
Backend: chat messages stored as embedded array — unbounded document growth, 16MB ceiling
Severity: high Domain: Chat Labels: performance, backend, data-model
Description
backend/src/models/Chat.ts:173 stores all messages as an embedded array in the Chat document. MongoDB's 16MB document size limit will be hit for active long-running chats. Reads also load the full message history into memory even when only the latest page is needed.
Options
- Migrate messages to a
Messagescollection keyed bychatIdwith pagination. - Cap embedded messages and archive older ones.
- Keep embedded but project only needed messages (slice) on reads.
Recommendation
Plan migration to a dedicated Messages collection. This is a large data-model migration that needs careful coordination.
Affected Files
backend/src/models/Chat.ts:173backend/src/services/chat/ChatService.ts— all read paths
References
- Full Codebase Audit 2026-05-30 — DEC-42